Includes 8 ft. tubing or wiring harness. LED digital display. 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning Auto-Dimming gauge brightness feature Includes high-quality Bosch wideband O2 sensor Display data in Lambda or numerical A/F ratio User programmable range Peak recall/memory 10:1 to 20:1 AFR Range for Gasoline Applications Adjustable for Alternate Fuel Types (Ethanol, Methanol, Propane, CNG) 6:1 to 18:1 AFR Range for Alternate Fuel Types User Programmable Warning Function This product has no provision for dial illumination/backlighting.